William p



@einen tutes @anni @fittaV WILLIAM P. PAnno'rT,:(eEoReE `HUGHEsfEXFuturo-R,) ND JOHN JtBonp- MAN, -oF BOSTON, mssnormenTTS. g

t Lesers Patent No. 77,834, steamy 12,1868.

IMPROVED Mons or RsMov-ING METALLICI souls PROM amiss AND "Moms" dlgs .rlgehule ritmes in im film 'Enters gitmt zum limltinggmt sf its smurf TO XL'L PERSONS TO WHQM THESE PRESENTS MAY COME:

Be it known thatwe, WILLIAM P. PARROTT and JOHN J. BORDMAN, of Boston, in the county of Sulfolk, and p State of'Massachusetts, have made a nevv'andI useful Inveutionfor RemcvingMetallic Scale `from Glass for the Moils of'Glass-Blowers Pipes or Implements; and we d o5her'eby declare the'is'ame Ato be fully described in the' following specification, and represented in theaccompanyingdrawings, ofwvhichmi' Figure I denotes a top view, i I

Figure 2 a. right side elevation,

Figure 3a left side elevation,

Figure 4 a. front end view,

Figure 5 a rear end elevation,

Figure 6 a longitudinal and vertical section,

Figure 7 a transverse section, i i' i l Figure 8'a horizontal section of the `apparatus or mechanism used by us in4 carrying out our invention.

It iswell known, in the process of blowing glass, that the traste glass which accumulates and sticks on thc 4blow-pipe after the formation of an article (thereby, when broken or knocked from th'c pipe, or from a. 'ponty, carries with it, from the pipe or ponty, more or less of the metal thereof, or an oxide of `such metal. -.This `refuse glass usually goes bythe name of moilstl t p Before the moils can be remelted and utilized'to advantage, it becomes desirable to remove from them these metallic inc'rustations, `such being theobject of our invention. i

-To accomplish this to the best advantage, we employ heat Vand a weak solution of iuoric acid and sulphuric or muriatic acid. The moils areto be'placed in the solution, and there' suffered to remain a suicient period,

heat being applied to it, so as to boil it in the meantime. After the metallicfoxide'or crust may have been Vremoved by the action of the acids and heat, themoils may be washed. i g Our process, and means employed in A carrying it out', may'also 'be employed for thezpurpose of separating a metallicV oxide from sandused in the manufacture ot' `glass'.` 'Y To obtainthe iluoric acidto advantage or economically, we employ-fluor spar, onivhich we pour sul'phnric acid and water, in or about in the proportion of one part, by weight, of lthe'spar,4 eight parts of the acid, and, 4 thirty-two parts of p'ater. 1 l

The apparatus we employ in our process, Vand represented in the accompanying drawings, we will now pro-` Y ceed to describe, and also to explain the mode of using it. Y

In such drawings, B denotes ra-boiler, pan, or covered vessel, set in bricktvork, overa furnace, A,'whose replace is shown at a. .g y

, Within the vessel B isian open pan or vessel, C, to contain the charge of moils, suchvessel C having holesV 4 or perforations through its sides, in order to admit a liquid, when-in the vessel B, to fion? freelyinto such vessel C. A space,f,`between the bottoms ofthe two vessels, answers to receive the fluor spar. I

Within the furnaceis a retort or generatonE, whichl communicatesrwith.the'vessel B by a pipe, The said generator is for the purposeA of generating iluoric gas separately from thevesselB, it being introduced into the latter vessel `by the pipe The generator istted witba stirrei or agitator, S, 'and the :cover of en clro the vessels, B and E, maybe provided with a sandsorjva'ter-joint, -where it rests on the said' vessel. Overthe boiler B isl a. condenser, D, whose worm-or Ipipe, d, communicates with or leads Iout of the vessel B, and terminates over the mouth of a pipe, e, which is arranged vith and'opens into the front end of the =vessel B, in manner asirepresented. Tli'e condenser is to receive the vapors from the boiler B, and condense them und 1 returnV them to the said boiler, the same being to' prevent the waste of acid and iluorine, which would otherwise take place. The tubes also serves to indicate the. height of the fluid in the boiler-,and for introducingcither 'water or acid therein.

A crane, T, arranged by the side of the furhace, is intended for raising .the vessel C out of or deposit itwithn the Vboiler, as circumstances may. require. The tube or'cistern, U, for containing water for cleansing the moils of the acid solution after being subjected to itsraction, may be arranged near tothe furnace.

'-In using this apparatusfor removing the metallic incrustations from glass or meils,.a suicient quantity of.v

the'uor spar is to'be laid on the bottom ofthe vessel-B, after-. which' the vesselv C, 'charged with themoils, should be introduced within the boiler B', which shouldbesupplied with water and acid, and afterward be closed. The furnace havingbeen charged with fuel, and its charge fired, the liquid in the boiler will be heated. The eom bined action of the heat'and acid will decompose the spar, and liberate the fluoric acid thereof, which will mix with the excess ot', s ulphuric acid. The acids will'soon' remove Vthe'scale, and leave the giass free ofit, after which the' meile maybe raised'out of the liquor and thrown into the washing-cistern U, andythere be cleansed of tlic acid solution which may adhere -to them. Instead ofv the iluor 'spar being placed in the boiler B, the

' generator may be charged with it, and with .suiicient quantity of acid and water, the vessel being 'supplied with water., -The Iluoric acid, in such case, will be found in the generator, and, with the sulphur-ic acid, makesl -ts way into theboiler. From time to time the charge voi' the generator may be agitated by the stirrcr S, which consists'of a vertcalshaft provided with wings and a handle, as representedin the drawings.

The generator is also specially` useful for the production of uoric-acid gas for introduction into thc vessel B, and its Water, when sand placed within such vessel is to be cleansed of metallic oxide. By putting a quantity of`lu-or spar and'sulphuric acid in the generator, we canproduce the iluoric' acid, which will 'flow through the pipe b into the vessel B, the water of which will absorb tleacid.l l

The advantage of the generator is that its charge of spar may be removed from it without disturbing the trayC in the'boiler. f

We claim as ou'i` invention, the following, vin;

The employment of heat and a weak solution of sulphuric or muriatic andluoric acids, in manner substan- Atiallyas described-, forremovaof the metallic oxide' or scale from the moil-s, or from the sand or silica-used for making glass.- Also, for the purpose set forth, we claim the combination of the vesselor traT C with the boiler B and the furnace 'I 'Als o, the combination, as well as the arrangement of the ,acid-generator E with the boiler B and the furnace A, the sai'd boiler audgenerator being connected,` as described.

Also, the combination of the condenser D with the boiler-furnace and the vessel C, or the same and the generator E.

WMfP. PARRorT, Witnesses: JNO. J. BORDMAN.

R. H. EDDY, 

